System of power supply



July 5, 1932. P. P. SOSINSKI 1,866,179

SYSTEM OF POWER SUPPLY Filed June 23, .1951

INVENTOR. P. F. 05/): ski,

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A ATTORNEY.

- embodying Patented July 5, 1932 UNITED STATES PATENT oriuca PAUL P. SOSINBKI, OF SWIB SVALE, PENNSYLVANIA, ABSIGNOB TO THE UNION SWITCH & SIGNAL COMPANY, OF SWIBSVALE, PENNSYLVANIA, A GOBPOBATION OF PENN- BYLVAN IA SYSTEM OF POWER SUPPLY Application filed June 23,

My invention relates to systems of power supply and more particularly to a system in WhlCh energy applied to the primary winding of an electromagnetic device causes power to be supplied from a secondary WlIldlIlg on said device through a contact controlled by the primary windin One object of my invention is to provlde a novel and improved power supply device combining the functions of a transformer and relay in which the relay elements do not interfere to a noticeable extent with the production of high efficiency and favorable regu lation in the transformer.

, A system of power supply embodying my invention is particularly suitable for supplying energy to light signals or highway crossing signals in which it is of prime 1mpo rtance that at certain times the signals remaln lighted without noticeable interruption, irrespective of the continuity of the normal energy supply.

Other objects and advantages will appearfrom the description which follows.

I will describe two forms of a system of power supply embodying my invention, and will then point out the novel features thereof in claims.

In the accompanying drawing, Fig. 1 is a diagrammatic view, partly in section, showing one form of a system of power supply my invention. Fig. 2 is a perspective vlew, partly in section showing another form of a system of power supply, also embodying my invention. Fig. 3 is a wiring diagram showing the electrical connections of the device of Fig. 1 or Fig. 2 applied to a load circuit consisting of a lamp and having a direct current source of energy in reserve.

Referring first to Fig. 1 of the drawing, the transformer relay shown therein, comprises a laminated core structure 1 of magnetizable material on which are mounted the usual primary and secondary windings 2 and 3, respectively. Coacting with the core 1 is a laminated magnetizable armature 4 pivoted upon a fixed pin 5, engaged by armature slot 10.

The armature 4 carries a block of insulating material 7 to which is attached, by means of two screws, one of which is shown at 9, a

I lease in spite of any residual flux which might remain after primary winding 2 is deenergized. Armature bearing slot 10 is so designed that a slight clearance exists between the top of bearing pin 5 and slot 10 with the armature in the energized position, as shown in the drawing. This floating bearing construction permits the armature to seat itself upon the core and makes quiet operation of the armature more easii r obtainable. Contact finger 8 coacting with contact post 12" serves as a stop to limit the downward movement of the armature in the deenergized position.

The operation of the transformer relay shown in Fig. 1 can be understood to best advantage by referring to the wiring diagram, Fig. 3. When an alternating current source of energy is applied across terminals 17 and 18 of primary winding 2, core 1 becomes magnetized and armature 4 is attracted to the closed position shown in Fig. 1, in which position contacts 811 and 8"11 become closed. A transformer voltage will appear by induction across terminals 19 and 20 of secondary winding 3 and a circuit will then exist for load L which may be traced from one terminal 19 of secondary winding 3, wire 21, contact 811, wire 22, load L, wire 23, contact 8"11 and wire 24 to the other terminal 20 of secondary winding 3. Load L may be any electrical load, being shown in Fig. 3 as a signal lamp.

When primary winding 2 becomes deenergized, caused by a power failure for example, armature 4 will release, opening contacts 811 and 8"-11", and closing contacts 8-12= and 8"-12". The deenergization of winding 2 transfers load L to an auxiliary source such as a battery B, and a circuit is established for load L which may be traced from the positive terminal of battery 1? wire 25, contact 8'12, wire 22, load L, wire 23, contact 8 12", and wire 26 to the negatlve terminal of battery B.

Referring to Fig. 2, the transformer relay structure shown therein operates in the same manner as the transformer relay illustrated in Fig. 1, the difference being that in F 1g. 2 an entirely separate transformer core 14 1s used which is separated from an independent relay core 16 by a non-magnetizable spacer 15. The windings 2 and 3 are, however, common to both transformer and relay cores, as in Fig. 1. The structure of Fig. 2 is somewhat more efficient electrically and has certain manufacturing advantages over the structure of Fig. 1.

Referring to Fig. 1, it is to be noted that the core 1 has been so designed that the flux set up by primary winding 2 has two flux paths, one of which in the upper portion of the core, comprising the major portion of the transformer flux, is completely closed. The other flux path' in the lower portion of the core includes an air gap and is threaded by the relay flux which operates armature 4.

One advantage of providing a closed path for a large part of the transformer flux is that a transformer having low magnetizing current and relatively high efficiency results therefrom. Another advantage is that since the relay armature must carry but a small portion of the total flux set up by the primary winding, it can be made to have a correspondingly small iron section, decreasing wear which results from the hammer blow of a heavy armature impinging on the core.

A further advantage is that the ferrules on the armature are linked by a small portion only of the total flux set up by the primary winding with a resultant decrease in copper loss and increase in overall efficiency of the transformer relay.

The above advantages combine to produce an automatic power supply and power transfer device which is both compact mechanically and electrically eflicient.

Although I have herein shown and described only two forms of a system of power supply embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim is:

1. In combination in closed magnetic structure, a divided magnetic structure, a primary and a secondary winding common to both structures, and a shortcircuited winding on said divided magnetic structure for phase splitting a portion of the a transformer, 8.

flux therein whereby uplon energization of said primary winding t e parts of said divided structure are continuously held in intimate contact.

2. A transformer comprising a closed magnetic structure and a ture having a plurality of relatively movable parts, a primary an a secondary winding common to both structures, and means associated with said divided structure whereby upon energization of the primary winding said parts are continuously held in intimate contact.

3. A transformer comprising a closed magnetic structure and a divided magnetic structure having a plurality of relatively movable parts, means whereby the flux in said closed magnetic structure is prevented from entering said divided magnetic structure, a primary and a secondary winding common to both structures, and means associated with said divided structure whereby upon energization of the primary are continuously held in intimate contact.

In testimony whereof I afiix my signature.

PAUL P. SOSI-NSKI.

divided magnetic strucwinding said parts 

